Interactive multiple-choice quiz: اختبار الوحدة الأولى (Matter and Energy in Ecosystems) - انسباير
اختبار الوحدة الأولى لمادة العلوم انسباير (Inspire Science) للصف السابع للفصل الدراسي الأول لعام 2026-2027. يغطي الاختبار مواضيع البناء الضوئي، والتنفس الخلوي، وانتقال المادة والطاقة في النظام البيئي، والدورات الطبيعية مثل دورة النيتروجين والماء، وتأثير الغازات الدفيئة. معدّ للمساعدة في المراجعة والتحضير للامتحانات بثقة.
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اختبار شهادة تدريبي مؤقت للصف والمادة والفصل نفسه.
اختر إجابة واحدة لكل سؤال. عند الاختيار ستظهر النتيجة فورًا: الأخضر صحيح، والأحمر خطأ، وسيظهر تفسير الإجابة مباشرة إن كان متوفرًا. وبعد آخر سؤال ستظهر الدرجة النهائية تلقائيًا.
Which is the best explanation of the change in energy shown in the model?
Explanation
During photosynthesis, light energy from the sun is converted into chemical energy and stored in the bonds of sugar molecules (glucose).
Question 2
2
Points: 1
In recent decades, average global temperatures have increased significantly. Scientists agree that the widespread destruction of the Amazon rain forest contributes to climate change. Which mechanism might be cited to support that hypothesis?
Explanation
Plants absorb CO2 (a greenhouse gas) during photosynthesis; fewer plants mean more CO2 remains in the atmosphere, trapping more heat.
Question 3
3
Points: 1
What is the function of stomata?
Explanation
Stomata are small openings on the leaf surface that regulate gas exchange, allowing CO2 in and O2 and water vapor out.
Question 4
4
Points: 1
During the process of photosynthesis, what gas do trees absorb and what gas do they release?
Explanation
Photosynthesis uses carbon dioxide and water to produce glucose and oxygen gas.
Question 5
5
Points: 1
Where does the first step of cellular respiration, glycolysis, occur?
Explanation
Glycolysis is the anaerobic first stage of cellular respiration and takes place in the cytoplasm of the cell.
Question 6
6
Points: 1
Analyze the food web. Which statement is correct?
Explanation
A food web illustrates how energy is transferred from one organism to another within an ecosystem.
Question 7
7
Points: 1
In an energy pyramid, approximately 10 percent of the energy available in one trophic level is transferred to the next level. Which statement helps explain why this occurs?
Explanation
Most energy is used for metabolic processes or lost as heat, leaving only about 10% to be passed to the next trophic level.
Question 8
8
Points: 1
Most producers, such as plants, make their food through which process?
Explanation
Producers like plants use sunlight, water, and carbon dioxide to create food (glucose) through photosynthesis.
Question 9
9
Points: 1
What is compost?
Explanation
Compost is created from decomposed organic material and is rich in nutrients, making it an excellent fertilizer.
Question 10
10
Points: 1
What is the primary focus of wildlife ecology?
Explanation
Wildlife ecology focuses on how animal species interact with each other and their environment.
Question 11
11
Points: 1
Keisha and her classmates created a model of the nitrogen cycle. Their diagram is shown below. What is the function of the bacteria shown in the model?
Explanation
Bacteria play a vital role in the nitrogen cycle by decomposing organic matter or fixing nitrogen, effectively returning it to the soil/system.
Question 12
12
Points: 1
Which of the following is NOT true about systems that cycle matter?
Explanation
According to the law of conservation of mass, matter is not created or destroyed, but only changes form.
Question 13
13
Points: 1
How do plants and other photosynthetic organisms obtain carbon?
Explanation
Autotrophs obtain carbon from the inorganic CO2 found in air or dissolved in water.
Question 14
14
Points: 1
What is the definition of "Evaporation"?
Explanation
Evaporation is the phase change from liquid state to gaseous state (vapor).
Question 15
15
Points: 1
What is the function of greenhouse gases in Earth's atmosphere?
Explanation
Greenhouse gases trap heat (infrared radiation) that is radiated from Earth's surface, keeping the planet warm.
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